1378720934 has 16 divisors (see below), whose sum is σ = 2085254928. Its totient is φ = 683653152.

The previous prime is 1378720933. The next prime is 1378720943. The reversal of 1378720934 is 4390278731.

It is a super-3 number, since 3×1378720934³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378720933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170957 + ... + 178839.

It is an arithmetic number, because the mean of its divisors is an integer number (130328433).

Almost surely, 2^1378720934 is an apocalyptic number.

1378720934 is a deficient number, since it is larger than the sum of its proper divisors (706533994).

1378720934 is a wasteful number, since it uses less digits than its factorization.

1378720934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8599.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1378720934 is about 37131.1316013935. The cubic root of 1378720934 is about 1112.9922064558.

The spelling of 1378720934 in words is "one billion, three hundred seventy-eight million, seven hundred twenty thousand, nine hundred thirty-four".